Recent content by ruleh

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    Log yet another portable pc / laptop thingy

    Update, more or less... I managed to buy a r9-290 somehow. It looks like this https://www.newegg.com/powercolor-radeon-r9-290-axr9-290-4gbd5-tdhe-oc/p/N82E16814131569. It is 20mm wider but 8mm shorter than a reference card. I tried putting the reference cooler on it but it has some weird heat...
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    Log yet another portable pc / laptop thingy

    A text only update... I ordered a bunch of new mosfets (IPI120P04P4L-03) and a new psu. The psu (dps-600pb b) arrived and is working well. It did make the unit 30-40mm wider but the length fit just right. The cables stick out by a decent bit but it still made overall cable management sonewhat...
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    Log yet another portable pc / laptop thingy

    This is yet another more or less mobile pc type project of which there a few now. The goal is to build an easily upgradeable laptop/portable pc suitable for running a virtual machine with gpu passthrough. Total power target is around 400W. This one is more of feasibility test or tech...
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    Completed DIY "laptop" / portable PC

    What about during transport? What length riser cable are using for the gpu? Surely not 30cm. :D
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    Completed DIY "laptop" / portable PC

    Looking nice! Seems so much cleaner without the battery and stuff. It even has (unintended?) space for sata drives on top of the psu. :D Are you going to place the keyboard closer to the front compared to the earlier designs? Also isn't assembling it, with the motherboard and gpu connected to...
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    Completed DIY "laptop" / portable PC

    Yes, you probably have to make your own io shield for the entire length and height of the (bottom) box. Not sure if shielding the sides is necessary. Seems likely. Even laptops with plastic covers seem to have some sort of conductive paint or a metal foil on them, probably for emi reasons. I...
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    Completed DIY "laptop" / portable PC

    If it has "Gen 2", that might also be worth a try. Though if 3 didn't work I doubt that 2 will. Also messing with the number of pcie lanes used for the gpu might do something. If the motherboard came with an io shield or something, using it might shield the wifi from a bit of interference...
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    Completed DIY "laptop" / portable PC

    What pcie version is the system running at? Maybe changing it might reduce (or increase) the interference.
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    Completed DIY "laptop" / portable PC

    Yes, the gpu blows air out the bottom left and the cpu blows out the top right. Both have the fan orientation swapped to pull case air through the heatsink and out of the case. At some point I wanted both to exhaust out the top but the pcie cable was too short, the gpu was too wide and the top...
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    Completed DIY "laptop" / portable PC

    Here are some...
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    Completed DIY "laptop" / portable PC

    With open air I got worse idle temperatures but mostly same load temperatures. (Somehow I expected the exact opposite.) With everything closed up: cpu temp went down from 75 to 67 gpu temp went down from 90 to 70 case air temp went down from 60 to 45 The gpu exhausts to the bottom and the cpu...
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    Completed DIY "laptop" / portable PC

    Something that worked for me was reversing the gpu and cpu fan direction so they exhaust all the hot air out of the case. It might be worth a try.
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    Completed DIY "laptop" / portable PC

    Those were the really wrong circumstances but everything seems somewhat ok, I think. The converter might have taken a hit but it still works. The battery also seems alive but I don't think that pushing >350W into it did it any good. Then again it didn't heat up too much, reaching 45˚C, so who...
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    Completed DIY "laptop" / portable PC

    It turns out that given the right (or really wrong) circumstances, a buck converter can also work as a boost converter in reverse, providing a high voltage on what should have been the input. So far max measured current was ~17A (at 22V) and max voltage 40V (0A), which is a bit higher than the...
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    Completed DIY "laptop" / portable PC

    Ahh that makes sense. However now I am somewhat more confused than before. I think I misunderstood something, just not sure what.